Seong-Hwan Cho

Title: Seong-Hwan Cho: Innovator in Frequency Calibration and Time Measurement Technologies

Introduction

Seong-Hwan Cho is a notable inventor based in Daejeon, South Korea. He has made significant contributions to the fields of frequency calibration and time measurement technologies. With a total of 3 patents to his name, his work has had a considerable impact on various technological advancements.

Latest Patents

One of his latest patents is titled "Automatically calibrating frequency features of a phase locked loop." This invention includes an open-loop automatic frequency calibration circuit that comprises a frequency detector, first and second sinks, a comparator, and a bank selector. The frequency detector generates up and down signals in response to the frequency difference between two phase difference signals. The first and second sinks discharge capacitors based on these signals, while the comparator compares their voltages. The bank selector utilizes a binary search to select an optimum bank and outputs a bank selection signal, allowing the voltage-controlled oscillator to adjust its frequency features accordingly.

Another significant patent is the "Time-to-digital converter with high resolution and wide measurement range." This invention features both low and high resolution time-to-digital converters, enabling it to provide high resolution alongside a wide measurement range. The low resolution converter measures time differences with a larger quantization step, while the high resolution converter uses a smaller quantization step for more precise measurements. This dual approach allows for a broader measurement range compared to the high resolution converter alone.

Career Highlights

Seong-Hwan Cho has worked with prominent organizations such as Samsung Electronics and the Korea Advanced Institute of Science and Technology. His experience in these leading companies has contributed to his expertise in developing innovative technologies.

Collaborations

Throughout his career, Seong-Hwan Cho has collaborated with notable colleagues, including Hyoung-Chul Choi and So-Myung Ha. These partnerships have likely enhanced his research and development efforts.

Conclusion

Seong-Hwan Cho's contributions to frequency calibration and time measurement technologies demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to advancing technology in meaningful ways.